# Cal.com v2.8.13 — Release & Upgrade Intelligence
- **Product:** Cal.com (https://cal.com)
- **Version:** v2.8.13
- **Released:** May 10, 2023
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/calcom/updates/v2.8.13/

## Executive Summary (TL;DR)
Cal.com v2.8.13. Source highlight: Stabilize Tests

## New Features
- Added validation for duration field in the event types
- feat: Add Zoho Bigin app to appstore
- CAL-1589: Added utm link to powered by in booker.
- feat: add search for members
- add "reset to default" color option for ColorPicker
- Add publishHandler user.id

## Improvements
- perf: split up routers to separate lambdas
- enhance Timezone Component with Box Shadow
- perf: tRPC procedures and middleware refactor
- CAL-1623 CAL-1620: Improve animation for booker, and push mini calendar down in fullscreen views
- CAL-1577: Improved input addon styles.

## Bug Fixes
- Fix/prevent duplicate avatars
- CAL-1558: Fixed responsiveness of booker for small calendar layout
- fix: changed assign to field as typeable input
- Fix Hover Effect in booking page
- fix: load date picker on client side
- Fix: Embed Theme switching when appearance is using System Theme